Casing for wells



Patented Nov. 24, 1931 PATENT OFFICE ISAAC A. DUNLAP, OF WICHITA., KANSAS CASING IOR Application led October 30, 1929. Serial No. 403,460.

l' side of the slot, in order to allow any silt or fine sand to flow freely into the Well and not accumulate at the outer edge of the casing, shutting off the water supply and ruining the well.

l,19. A further object of this invention is to insure against accumulation in the slots or perforation by increasing the area thereof on the inside of the casing, so that silt of any kind entering from the outside may' pass 15. freely therethru into the well, from whence it is removed as a preservative to the well.

A still further object of my invention is to provide a steel setting tube of such diameter as to receive the casing slideable therein and as a means of properly installing the casing in axial alignment with the well.

A still further object of my invention is to provide a. setting tube that may be lowered thru any mud formation to a hard pan or the like, by which means the bottom of the tube is sealed while the concrete being set.

A still further object of my invention is to provide a setting tube as supporting means for the casingin vertical alignment until the coarse gravel or broken stone is placed around the outside of the permanent casing. while the setting tube is beingremoved. These and other objects will be hereinafter more fully explained, reference being had to the accompanying drawings forming a part of this specification, in which like characters will apply to like parts in the different views; and' in which Fig. l is an elevation of the slotted members, shown partly in section; Fig. 2 is an elevation of the slotted members, a portion of the solid sections and fragmentary portions of the installation tubings.

Fig. 3 is an enlarged detailed sectional view showing the method of reinforcing the concrete and the slant of the slots therethru.

Fig. 4 is sectional View taken on line casing is l Iv-1v in Fig. 2.

My invention herein disclosed consists of a casing member l, the said member having a pluralit of segmental slots 2 spaced apart lon 'tu inally o the slots and the casing, the sai slots slanting downward and inward, and bein flared to increase the inside area of the slot, y which means silt of any nature will pass freely therethru into the casing, and being slanted downward as a means of discharging silt into the well from whence it may be easily removed. The said casing is preferably made of concrete and reinforced with metallic rods 3 and 3'; there being one intermediately positioned (vertically) between the ends of the slots and one transversely positioned (horizontally) between each of the rows of slots; all of which is clearly disclosed in the drawings. It will be understood that both ends of the casin are smooth for horizontal engagement, so t at a plurality of the slotted members may be stacked in the well to the a proximate water level, and from thence to the top of the well a plurality of casings 1 reinforced in like manner but void of the slots.

As a guiding means for the installation of the casing members within the well, I have rovided a setting tube 4, which extends rom the bottom to the top of the well, the said tube to be withdrawn gradually as a filling of coarse gravel or broken stone 5 is being ilaced there around as hereinafter describe In the process of installing my casing, I use another setting tube where loose soll or sand is present and tends to cave in the sides of the well. As a means of controlling Such conditions I insert a tube 6, which is large enough in diameter to provide a liberal space between the wall thereof and the first vsaid setting tube 4, and in which said tube 4 is placed as illustrated in the drawings. I then install my concrete casing within the setting tube 4: by first placing the slotted members to the approximate water level and solidmembers from thence to the top of the well. The space around the setting tube is then filled to the assumed water level with coarse gravel or broken stone; and from the gravel to the top of the well with fine sand or soil. It will be understood that the tubing v above referred to will be drawn upward alternetely as the filling is placed, allowing at all times a, short portion of the lower ends of the tubing to be imbedded while additional lling is being placed; this method to con- 5 tinue to the top of the well, until the tubes are removed therefrom. Itis further understood that, in the event of a irm formation of the earth, the installation of tube 6 may be omitted, and in such event the setting is r. y 10 formed as above described. Such modi ca.-

tions may be employed as lie within the scopev of the appended claim and having fully described my invention, what I claim as new and desire to secure by Letters Patent is 15 In a concrete casing of the class described, casing sections having a plurality of spaced apart elongated slots circumferentially and longitudinally aligned, the upper and lower Walls of each slot sloping downwardly toward the axis of the casing and diverging in wardly, and reinforcing rods extending circumferentially an'd longitudinally between the rows of slots. v In testimony whereof I ailix my signature. 5 ISAAC A. DUNLAP. 

